wikimedia/mediawiki-extensions-Wikibase

<?php

namespace Wikibase\DataModel\Services\Diff;

use Diff\DiffOp\Diff\Diff;
use Diff\DiffOp\DiffOp;

/**
 * Represents a diff between two Item instances.
 *
 * @since 1.0
 *
 * @license GPL-2.0-or-later
 * @author Jeroen De Dauw < jeroendedauw@gmail.com >
 */
class ItemDiff extends EntityDiff {

    /**
     * @param DiffOp[] $operations
     */
    public function __construct( array $operations = [] ) {
        $this->fixSubstructureDiff( $operations, 'links' );

        parent::__construct( $operations );
    }

    /**
     * Returns a Diff object with the sitelink differences.
     *
     * @return Diff
     */
    public function getSiteLinkDiff() {
        return isset( $this['links'] ) ? $this['links'] : new Diff( [], true );
    }

    /**
     * @see EntityDiff::isEmpty
     *
     * @return bool
     */
    public function isEmpty(): bool {
        return parent::isEmpty()
            && $this->getSiteLinkDiff()->isEmpty();
    }

    /**
     * @see DiffOp::getType
     *
     * @return string
     */
    public function getType(): string {
        return 'diff/item';
    }

}